Hello, -----Message d'origine----- De la part de samaelkreutz Envoyé : mercredi 12 mars 2014 08:14
> My model has the following form: > > log(PGA) = d1*e1 + d2*e2 +...+d(max number of M bins)*e(max number of M bins) > + a*log(R/Ref) + b*(R-Ref) > [...] > x=MI\log(PGA); > [...] > My question is: I obtained the foliowing coeff. > But some of them doesn't fit well! > My teacher said "Make a simple regression, obtain coefficients > and then iterate again to get the final coefficients" I'm afraid I don't understand very well your problem. Probably a lack of vocabulary on my side, I don't know what a "M bin" is, I don't use this in my job. The backslash performs a linear regression (as long as MI is not square). What do you mean by "simple regression" ? Additionally, you use a W and don't explain what it is. >From your example, it is not clear which coefficients you try to refine (the d's, the e's ?) Maybe you could send a full (and not too complicated) script that we can run, and point out why the values you get are not satisfying. Regards. -- Christophe Dang Ngoc Chan Mechanical calculation engineer ______________________________________________________________________ This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error), please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. ______________________________________________________________________ _______________________________________________ users mailing list [email protected] http://lists.scilab.org/mailman/listinfo/users
